MESON Chess Problem Database

Problem Display
PID: 232242 (8/8/8/5Q2/2br2n1/2Pp1pr1/1K2PRN1/2NkB1R1 w - - 0 1)

Skarabaus, ?

Schweizerische Schachzeitung, 1987

8/8/8/5Q2/2br2n1/2Pp1pr1/1K2PRN1/2NkB1R1

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf2
      • 2.Se3#
    • 1...Sh2
      • 2.Se3#
    • 1...Se3
      • 2.Sxe3#
    • 1...Se5
      • 2.Se3#
    • 1...Sf6
      • 2.Se3#
    • 1...Sh6
      • 2.Se3#
    • 1...dxe2
      • 2.Qc2#
    • 1...d2
      • 2.Qc2#
  • Tries
    • 1.exf3?
      • threat
        • 2.Bd2#
        • 2.Rd2#
      • 1...Sxf2
        • 2.Se3#
      • 1...Re4
        • 2.Rd2#
      • 1...Sh2
        • 2.Se3#
        • 2.Rd2#
      • 1...Se3
        • 2.Sxe3#
        • 2.Rd2#
      • 1...d2
        • 2.Qc2#
      • 1...Rxg2!
    • 1.e3?
      • threat
        • 2.Bd2#
        • 2.Rd2#
      • 1...Rxg2
        • 2.Qxf3#
      • 1...Sxe3
        • 2.Sxe3#
        • 2.Rd2#
      • 1...Sh2
        • 2.Rd2#
      • 1...d2
        • 2.Qc2#
      • 1...Sxf2!
    • 1.e4?
      • threat
        • 2.Bd2#
        • 2.Rd2#
      • 1...Rxg2
        • 2.Qxf3#
      • 1...Rxe4
        • 2.Rd2#
      • 1...Sxf2
        • 2.Se3#
      • 1...Sh2
        • 2.Se3#
        • 2.Rd2#
      • 1...Se3
        • 2.Sxe3#
        • 2.Rd2#
      • 1...d2!
  • Keys
    • 1.exd3!
      • threat
        • 2.Bd2#
        • 2.Rd2#
      • 1...Rxg2
        • 2.Qxf3#
      • 1...Rxd3
        • 2.Bd2#
      • 1...Bxd3
        • 2.Rd2#
      • 1...Sxf2
        • 2.Se3#
      • 1...Re4
        • 2.Rd2#
      • 1...Sh2
        • 2.Se3#
        • 2.Rd2#
      • 1...Se3
        • 2.Sxe3#
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • S(g);N_GUARD,XR(F)::S(G)
    • S(g);N_GUARD::S(G)
    • S(g);N_GUARD::S(G),XS(g)
    • P(b);OGATE,XP(E)::QAB1(I)
    • P(b);OGATE::QAB1(I)
  • Tries
    • Try
      • P(E);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(g);N_GUARD,XR(F)::S(G)
        • R(f);::R1(F)
        • P(b);OGATE::QAB1(I)
      • Refutation
        • R(d);P_PINR(F),XS(G)
    • Try
      • P(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);N_GUARD,P_PINR(F),XS(G)::QAB(I),XP(c)
        • S(g);::R1(F)
        • P(b);OGATE::QAB1(I)
      • Refutation
        • S(g);XR(F)
    • Try
      • P(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);N_GUARD,P_PINR(F),XS(G)::QAB(I),XP(c)
        • R(f);XP(E)::R1(F)
        • S(g);N_GUARD,XR(F)::S(G)
      • Refutation
        • P(b);
  • Actual
    • P(E);XP(b)
    • Threat
      • DUALS(2)
    • Vars
      • R(d);N_GUARD,P_PINR(F),XS(G)::QAB(I),XP(c)
      • R(f);XP(E)::R(C)+B(B)
      • B(e);XP(E)::R1(F)
      • S(g);N_GUARD,XR(F)::S(G)
      • R(f);::R1(F)
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